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Image forming apparatus and drum unit

  • US 10,558,139 B2
  • Filed: 07/23/2019
  • Issued: 02/11/2020
  • Est. Priority Date: 12/15/2016
  • Status: Active Grant
First Claim
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1. An image forming apparatus, comprising:

  • a main housing;

    a drum unit detachable from the main housing, the drum unit comprising;

    a photosensitive drum assembly;

    a bearing supporting the photosensitive drum assembly rotatably; and

    a drum frame supporting the bearing; and

    an exposure head comprising;

    a plurality of light emitters aligned along an axial direction which is a direction of a rotation axis of the photosensitive drum assembly;

    a lens array for focusing light from the light emitters on the photosensitive drum assembly; and

    a head frame supporting the light emitters and the lens array,wherein the bearing includes;

    a contact face being in contact with the exposure head along a direction of an optical axis of the light; and

    a face being in contact at least partly with the drum frame in a rotating direction of the photosensitive drum assembly.

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